On occasion a page clearly seems to have loaded completely... but the notice on the bottom says data is still being transferred from the site... and I'm unable to back up to the previous page using the back button OR the link to the previous site on the drop down menu.

Confirmed, I have more issues like this, some reported, like facebook doesn't work with FF engine, icons, chat... reddit, video loading problems, white screen on some pages, even refresh doesn't work, just duplicate works as workaround...